Loomis Vs. Silver Halves

I live in a small town north of Boston. My bank orders $500 boxes of half dollars from a nearby Loomis site. My experience is that most of those boxes are "ice cold" (they contain no silver). But occasionally I get one that is quite "hot". Recently I acquired a $500 Loomis box that contained 34 40% silver coins and a few 90% silver coins (including a Walking Liberty half dollar). About a year ago, I acquired a Loomis box that contained 20 40% silver half dollars and four 90% silver coins (including another Walking Liberty coin). I think the "good" Loomis boxes contain silver coins that were stolen from a collector or cashed in by a naive family member who didn't realize their value. I also have found silver half dollars at other banks after I purchased the small number of coins that a customer turned in for cash.

I've heard rumor that Lumis pulls out the silver halves. I don't know how true this is. Banks in my area order from Lumis but don't order halves. I could get them special ordered (2 box minimum) but the bank won't except them back.